Use your E and E again. Then Q your first barrel and Flash before using your E for a third and final time.
Use your E and AA the barrel, then use your E again and AA the first barrel again.
Use your E, wait briefly for your barrel to tick down, then Q and E again to finish.
Press R then E, AA, AA, Q your barrel, AA and another AA.
Use your E, E again, then wait briefly, then Q your first barrel and then E again to finish.
Use your Q then instantly F and AA.
Use your E and Q your target. Then AA, AA, AA your barrel, AA your target, Q them and AA to finish.
Press your E, then AA, AA, Q your barrel and finish with another AA.